Display panel and display device

Abstract

A display panel and a display device are provided. The display panel includes a TFT layer, an auxiliary electrode, a protection layer having a first opening, a connection layer positioned above the protection layer, a first electrode positioned above the connection layer, and a second electrode positioned above the connection layer. The first electrode is positioned above the connection layer and electrically connected to the TFT through the first opening. The second electrode is electrically connected to the auxiliary electrode through a via.

What is claimed is: 
     
         1 . A display panel, comprising:
 a thin film transistor (TFT) layer, comprising a TFT;   an auxiliary electrode;   a protection layer, positioned above the TFT layer and the auxiliary electrode;   a connection layer, positioned above the protection layer, the connection layer comprising a blocking portion, wherein the blocking portion and the protection layer have a via;   a first electrode, positioned above the connection layer and electrically connected to the TFT;   a second electrode, positioned above the connection layer; and   a light emitting layer, positioned above the connection layer and electrically connected to the first electrode and the second electrode;   wherein the light emitting layer is disconnected at a position of the via, and the second electrode is electrically connected to the auxiliary electrode through the via.   
     
     
         2 . The display panel of  claim 1 , wherein the light emitting layer comprises a first part disconnected at the position of the via, the second electrode comprises a second part disconnected at the position of the via, and the first part is positioned above the first part and electrically connected to the auxiliary electrode through the via. 
     
     
         3 . The display panel of  claim 2 , wherein the second part directly contacts the auxiliary electrode and a contact part of the second part contacting the auxiliary electrode is blocked by the blocking portion. 
     
     
         4 . The display panel of  claim 1 , wherein the TFT layer comprises a source/drain layer, the source/drain layer comprises a drain of the TFT, the protection layer has a first opening, the connection layer comprises a connection part, and the first electrode is electrically connected to the drain of the TFT through the connection part at the first opening. 
     
     
         5 . The display panel of  claim 4 , wherein the auxiliary electrode and the drain are at a same layer and of a same material. 
     
     
         6 . The display panel of  claim 4 , wherein the source/drain layer further comprises a solder pad positioned in a non-display region of the display panel; the protection layer comprises a fourth opening exposing the solder pad; the connection layer comprises a protection portion electrically connected to the solder pad through the fourth opening; and the protection portion fully covers the solder pad in a top view. 
     
     
         7 . The display panel of  claim 1 , further comprising:
 a packaging layer positioned above the first electrode, the second electrode and the light emitting electrode;   a middle film layer; and   a filling layer;   wherein the middle film layer and the filling layer are positioned between the packaging layer and the connection layer; the middle film layer comprises a third opening connected to the via; and the filling layer fills up the third opening and supports the packaging layer.   
     
     
         8 . The display panel of  claim 7 , wherein the middle film layer comprises:
 a planarization layer, positioned between the connection layer and the first electrode; and   a pixel definition layer, positioned between the first electrode and the light emitting layer;   wherein the third opening pass through the second electrode, the light emitting layer, the pixel definition layer and the planarization layer; and the filling layer contacts the packaging layer.   
     
     
         9 . The display panel of  claim 1 , wherein a material of the connection layer comprises molybdenum and/or titanium. 
     
     
         10 . A display panel comprising:
 a thin film transistor (TFT) layer, comprising a TFT;   an auxiliary electrode;   a protection layer, positioned above the TFT layer and the auxiliary electrode, the protection layer comprising a first opening;   a connection layer, positioned above the protection layer, the connection layer comprising a blocking portion, wherein the blocking portion and the protection layer comprise a second opening and a lower width of the second opening is greater than an upper width of the second opening;   a first electrode, positioned above the connection layer;   a second electrode, positioned above the first electrode; and   a light emitting layer, positioned between the first electrode and the second electrode;   wherein a material of the connection layer comprises molybdenum and/or titanium, the first electrode is electrically connected to the TFT through the connection portion at a position of the first opening; the light emitting layer is disconnected at a position of the second opening; and the second electrode is electrically connected to the auxiliary electrode through the second opening.   
     
     
         11 . The display panel of  claim 10 , wherein the light emitting layer comprises a first part disconnected at the position of the second opening; the second electrode comprises a second part disconnected at the position of the second opening, and the first part is positioned above the first part and electrically connected to the auxiliary electrode through the second opening. 
     
     
         12 . The display panel of  claim 11 , wherein the second part directly contacts the auxiliary electrode through the second opening and a contact part of the second part contacting the auxiliary electrode is blocked by the blocking portion. 
     
     
         13 . The display panel of  claim 10 , wherein the TFT layer comprises a source/drain layer that comprises a drain of the TFT, and the first electrode is electrically connected to the drain of the TFT through the connection part at the first opening. 
     
     
         14 . The display panel of  claim 13 , wherein the auxiliary electrode and the drain are at a same layer and of a same material. 
     
     
         15 . The display panel of  claim 13 , wherein the source/drain layer further comprises a solder pad positioned in a non-display region of the display panel; the protection layer comprises a fourth opening exposing the solder pad; the connection layer comprises a protection portion electrically connected to the solder pad through the fourth opening; and the protection portion fully covers the solder pad in a top view. 
     
     
         16 . The display panel of  claim 10 , further comprising:
 a packaging layer positioned above the first electrode, the second electrode and the light emitting electrode;   a middle film layer; and   a filling layer;   wherein the middle film layer and the filling layer are positioned between the packaging layer and the connection layer; the middle film layer comprises a third opening connected to the via; and the filling layer fills up the third opening and supports the packaging layer.   
     
     
         17 . The display panel of  claim 16 , wherein the middle film layer comprises:
 a planarization layer, positioned between the connection layer and the first electrode; and   a pixel definition layer, positioned between the first electrode and the light emitting layer;   wherein the third opening pass through the second electrode, the light emitting layer, the pixel definition layer and the planarization layer; and the filling layer contacts the packaging layer.   
     
     
         18 . A display device, comprising a display panel, the display panel comprising:
 a thin film transistor (TFT) layer, comprising a TFT;   an auxiliary electrode;   a protection layer, positioned above the TFT layer and the auxiliary electrode;   a connection layer, positioned above the protection layer, the connection layer comprising a blocking portion, wherein the blocking portion and the protection layer have a via;   a first electrode, positioned above the connection layer and electrically connected to the TFT;   a second electrode, positioned above the connection layer; and   a light emitting layer, positioned above the connection layer and electrically connected to the first electrode and the second electrode;   wherein the light emitting layer is disconnected at a position of the via, and the second electrode is electrically connected to the auxiliary electrode through the via.   
     
     
         19 . The display device of  claim 18 , wherein the light emitting layer comprises a first part disconnected at the position of the via, the second electrode comprises a second part disconnected at the position of the via, and the first part is positioned above the first part and electrically connected to the auxiliary electrode through the via. 
     
     
         20 . The display device of  claim 19 , wherein the second part directly contacts the auxiliary electrode and a contact part of the second part contacting the auxiliary electrode is blocked by the blocking portion.